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First isomeric quadrupole moment measured in fragmentation reactions: The case of 61 Fem 9/2+

Abstract : This paper demonstrates the feasibility of quadrupole moment measurements on isomeric levels populated in projectile fragmentation reactions. The neutron-rich 61Fe(9/2+) [E*= 861 keV, T1/2= 239(5) ns] isomer was produced and spin aligned by the intermediate energy fragmentation of a 64Ni beam and implanted in a Cd single crystal. Its spectroscopic quadrupole moment |Qs|=41(6) e fm2 agrees with mean-field based calculations using the finite-range Gogny force, suggesting a moderately deformed shape characterized by an intrinsic charge quadrupole moment Q0=-85 e fm2 or Q0=+115 e fm2. The present measurement paves the way for future determinations of isomeric quadrupole moments in more exotic nuclei.
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http://hal.in2p3.fr/in2p3-00153274
Contributor : Michel Lion <>
Submitted on : Friday, June 8, 2007 - 4:52:57 PM
Last modification on : Thursday, February 1, 2018 - 1:26:15 AM

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N. Vermeulen, S. K. Chamoli, J. M. Daugas, M. Hass, D. L. Balabanski, et al.. First isomeric quadrupole moment measured in fragmentation reactions: The case of 61 Fem 9/2+. Physical Review C, American Physical Society, 2007, 75, pp.051302. ⟨10.1103/PhysRevC.75.051302⟩. ⟨in2p3-00153274⟩

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